"I don't know what to do with a baby. I have nothing…I've done absolutely nothing for the baby room."
Williams also described finding out that she was expecting her first child during a home pregnancy test, telling the magazine, "[I thought] I'll take it just because (a) to prove you wrong and (b) because it's fun, whatever. It's like a joke, why not? An hour and a half later, I went back to the bathroom and I totally forgot about it because it was impossible for me…So I went back to get dressed and I went back in the bathroom and I was like, ‘Oh yeah, that test.'"
She explained her initial reaction upon seeing the test results by revealing that she "did a double take."
"My heart dropped. Like it literally dropped."
Earlier this summer, Williams' soon-to-be husband opened up about how he knew that motherhood would come easily to his leading lady.
"She's very good at a lot of things and well on her way to being an awesome mom too," he told CNBC's Squawk Box before noting that he will be going on paternity leave from the company after their little one arrives.
"I'll be taking off for six weeks myself and trying to do the best job possible as a new dad, a first-time dad."
Congratulations to both on their exciting arrival!